# Saylor Innovations Gas Estimator (Optimism)

> Saylor Innovations Gas Estimator (Optimism) is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-30).

Estimates gas cost for a transaction on the Optimism EVM network, returning gas units, gas price, and estimated fee in native token

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/optimism/estimate-gas?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-gas-estimator-optimism-9ed93d84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BPoFcUDviVLQMwLgzx36i

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-gas-estimator-optimism-9ed93d84
```

Example prompt: Estimate the gas cost for calling this contract on Optimism — the target address is 0x4200000000000000000000000000000000000006 and the calldata is 0xd0e30db0. Tell me the gas units, gas price in gwei, and the estimated fee in ETH.

## When to prefer this

Use this endpoint when you need gas estimates specifically on the Optimism L2 network. Prefer it over generic gas estimators when you need Optimism-specific gas pricing (which uses a two-component fee model), want to detect potential reverts before submission, or are building cost-comparison tooling across EVM chains. Sibling endpoints cover Arbitrum, Polygon, Base, and Ethereum mainnet for cross-chain comparisons.

## Known failure modes

- Invalid or missing 'to' address returns an error field with description
- Transaction simulation reverts — reverted field is true and gas may be null
- Malformed calldata causes estimation failure with error string
- Network connectivity issues to Optimism RPC result in error response
- No calldata provided for contract interactions that require it may return inaccurate estimate

## How this service works

Gas Estimate (optimism). Optimism gas estimate for a transaction (?to=, ?from=, ?data=, ?value=) with current gas price and estimated fee in the native coin; reverts reported cleanly.

## Output

Returns a JSON object with the chain name ('optimism'), estimated gas in units, gas price in gwei, estimated transaction fee in native ETH, a boolean indicating whether the transaction would revert, and an optional error message if simulation failed or gas could not be estimated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "to": {
       "type": "string",
       "description": "0x target (query)"
      },
      "data": {
       "type": "string",
       "description": "optional 0x calldata (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "chain",
      "reverted"
     ],
     "properties": {
      "gas": {
       "type": [
        "number",
        "null"
       ]
      },
      "chain": {
       "type": "string"
      },
      "error": {
       "type": [
        "string",
        "null"
       ]
      },
      "native": {
       "type": "string"
      },
      "reverted": {
       "type": "boolean"
      },
      "est_fee_native": {
       "type": [
        "string",
        "null"
       ]
      },
      "gas_price_gwei": {
       "type": [
        "number",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-gas-estimator-optimism-9ed93d84/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)